Cypress CY4603, Руководство пользователя

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HX3 Kits User Guide, Doc. #: 001-91203 Rev. *D 29
Kit Operation
Figure 3-17. Port Status Indicator LEDs on CY4613
The GPIOs used to implement the port status indicator LEDs (except D10, D11, and D12) are also
used for implementing the pin strap feature. For example, the DS1_GRN port status indicator LED
on the CY4603 board is shared with the PORT_DIS[0] pin strap feature, as shown in
Figure 3-18 .
The PORT_DIS[0] pin strap feature is implemented using a three-pin jumper. When the jumper is
placed between pin 1 and 2, the shared GPIO used for the PORT_DIS[0] feature is pulled HIGH.
When the jumper is placed between pins 2 and 3, it is pulled LOW. To support the port status
indicator LED functionality in both the pull-up and pull-down settings, one LED is used for each
setting.
Figure 3-18. Port Status Indicator LEDs Using Shared GPIOs
Port Status Indicator LEDs
for Downstream Port 1
DS1_SS LEDs (D1 and D13)
DS1_GRN LEDs (D2 and D14)
DS1_AMB LEDs (D3 and D15)
Port Status Indicator LEDs for
Downstream Port 2
Port Status Indicator LEDs
for Downstream Port 3
Port Status Indicator LEDs
for Downstream Port 4
'6B*5((1*3,2
PORT_DIS[0]
V3p3
J19
3PIN JUMPER
1
2
3
D14 LTST-C190KGKT
R67 10K
D2
LTST-C190KGKT
R66 10K
R22
300R
R9
225R
Implementation of DS1_GRN
using two LEDs
Implementation of PORT_DIS[0] pin strap
using a three-pin jumper